Checking for a powershell version - powershell

Question

Hi I currently have a very basic PowerShell script that runs when a computer is installed with Windows (any version). This script is below
Set-ExecutionPolicy -Scope Process -ExecutionPolicy Unrestricted -Force
[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072
Write-Output "Installing OS Updater Modules Please Wait...."
Write-Output " "
Install-PackageProvider -Name NuGet -Force
Install-Module -Name PSWindowsUpdate -Force
Write-Output " "
Write-Output "Installing Updates...."
Write-Output " "
Install-WindowsUpdate -AcceptAll -Install -IgnoreReboot | Out-File "c:\temp\WindowsUpdate.log" -force
As I said very simple code this will install a few modules then update windows with any updates, however, it only works with PowerShell 5 and above is there a way I can check what version is installed then carry on with the script if it is PowerShell 4 and below stop executing the script.
I know it's possible to install Windows Management Framework 5.1 into the install.wim/esd which will get around this but for people who don't have this, I would like the script to stop and not have any errors.

Answer 1

u can use cmdlet named "get-host", it works in ps version >=2.0
if ((get-host).version.major -le 4)
{
#code
}
else
{
#code
}
or if u need exact match , u can use switch construction
switch ((get-host).version.major)
{
4 {#installcode4}
5 {#installcode5}
7 {#installcode7}
}